Hydrochloric Acid → 8-[(3-Fluoropyridin-2-yl)methoxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylic acid hydrochloride

Participants

Reaction Conditions

Reaction Steps

4.66 g of ethyl 8-[(3-fluoropyridin-2-yl)methoxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylate (Example 116A, 14.2 mmol) were dissolved in 304 ml of THF/MeOH (5/1), 70.8 ml of 1 N aqueous lithium hydroxide solution (70.8 mmol) were added and the mixture was stirred at 40° C. overnight. The reaction mixture was acidified (pH about 3-4) using 1 N aqueous hydrochloric acid, and the solution was concentrated. The precipitate formed was cooled with ice-water and then filtered off with suction and dried under reduced pressure. This gave 3.97 g of the product (83% of theory).

Provenance & Evidence